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Reproduction in flowering plants MCQS 1
Reproduction in flowering plants MCQS 1
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Biotechnology MCQs 1
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Morphology of flowering plants MCQs 1
Morphology of flowering plants MCQs 1
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Cytology MCQs 1
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Ecology MCQs 2
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Plant anatomy MCQs 1
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New Post has been published on https://ramneetkaur.com/plant-anatomy-mcqs-1/
Plant anatomy MCQs 1
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Question #1: The living tissue that provides support to the growing parts of the plant, is
sclerenchyma collenchyma parenchyma fibres
Question #2: With reference to bark, which one of the following statements is false?
it is a tissue which is completely living. it is a tissue external to innermost phellogen. protects loss of water. protects the tree from infection.
Question #3: Major part of wood of old dicot stem is filled with tannins, resins and gums. This part is called
heartwood soft wood sap wood hard wood
Question #4: In the stelar evolution, the type of stele that is highly evolved is
dictyostele haplostele atactostele solenostele
Question #5: The major function of sieve tubes in plants, is
mechanical support. translocation of organic solutes. translocation of water & minerals. food storage.
Question #6: Both phloem sieve tubes and xylem vessels are derived from same kind of precursor cell, but at maturity they are very different. What feature is unique to phloem sieve tubes?
The cell membrane remains intact in a mature functioning cell. The cell wall is rigid because of deposition of lignin. The cell undergoes programmed cell death during development. The cell contributes to the mechanical support of the stem.
Question #7: Which combination of characterstics of a vessel element are most important for water movement in the xylem?
Rigid cell wall, cell dead at maturity, end walls absent. Rigid cell wall, reduction in size of plastids & mitochondria, end walls present. Rigid cell wall, living cell membrane, end walls absent. flexible cell wall, cell dead at maturity, end walls absent.
Question #8: Pericycle of roots is the site of origin of
lateral roots. secondary meristems. cambium. all of the above.
Question #9: The living and non-lignified component of vascular bundles are
vessel & tracheid. vessel & phloem. wood fibres & phloem. wood parenchyma & phloem.
Question #10: Cell division typically occurs only in the meristematic regions of plants. In which region would cell division not occur?
shoot apex. wood. expanding leaf. cambium between wood & bark.
Congratulations, you passed! I'm sorry but you did not achieve the required score.
Also read: vascular tissue system
Also watch: secondary growth
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Auxins
[wp_ad_camp_1] Auxins: Term ‘auxein’ means to grow. Weak organic acid Found in the root & shoot tip. Shows polar movements: i.e., shoot tip downwards & root tip upwards. Charles Darwin & his son Francis Darwin: 1st reported the presence of auxin in the coleoptile of canary grass (Phalaris). They showed that the coleoptile started growing towards unilateral illumination (phototropism), while the…
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